Table 1. Mean item characteristics of French materials.

Standard deviations are shown in parentheses.

Property	Plural-dominant	Singular-dominant
Plural
Word frequency	34.66 (50.18)	36.17 (83.54)
Cumulative stem frequency	50.38 (69.00)	149.04 (245.87)
Phonological neighbourhood	6.46 (7.92)	7.85 (7.42)
Orthographic neighbourhood	2.12 (2.78)	3.15 (2.77)
Number of syllables	1.69 (0.68)	1.65 (0.63)
Number of phonemes	4.38 (1.39)	4.35 (1.20)
Number of letters	7.38 (1.72)	7.04 (1.28)
Age of acquisition	4.31 (1.69)	4.62 (1.60)
Visual complexity	2.12 (0.55)	2.21 (0.60)
Name agreement	0.96 (0.05)	0.97 (0.05)
Singular
Word frequency	14.47 (20.13)	112.80 (171.43)
Cumulative stem frequency	50.38 (69.00)	149.04 (245.87)
Phonological neighbourhood	6.46 (7.92)	7.85 (7.42)
Orthographic neighbourhood	2.35 (3.70)	3.62 (3.38)
Number of syllables	1.69 (0.68)	1.65 (0.63)
Number of phonemes	4.38 (1.39)	4.35 (1.20)
Number of letters	6.38 (1.72)	6.04 (1.28)
Age of acquisition	4.31 (1.69)	4.62 (1.60)
Visual complexity	1.71 (0.53)	1.84 (0.61)
Name agreement	0.97 (0.03)	0.98 (0.04)